Bq27510-G2 battery percentage detection
Hi all,I am using BQ27510-G2 in my device for battery monitoring. The problem I am facing that when unit is in ON condition it shows the correct percentage value but when I OFF the unit and after 4 - 5...
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BQ34Z100-G1 schematic circuit design review
Hi,Please see my requirement as below.I am working on Li-Ion battery battery charger and monitoring circuit design.My Input is 5V@500mA (USB Power). My system Load is 5V @ 200mA max. And I have 10AHr...
View ArticleChemistry Selection: Panasonic BK-4MCCE with BQ34Z100-G1
Hello,I'm looking for the best chemical ID file for Panasonic BK-4MCCE. I have downloaded the latest Chemistry Updater, but I can't find this model.This is 1.2V 800mAh NiMH battery.Thank you for your...
View Articlebq20z65RSOC Drift
We have a 4S1P (Chem ID 1104) pack that uses a bq20z65 fuel gauge. As the pack cycles up and down The RSOC begins to drift upwards. By the 10th or 12th cycle the RSOC reads approx. 26% at full...
View Article4 minute issue
I think that my bq27425 takes 4 minutes to accumulate data because the CFGUPMODE flag is set. The spec says that it either gets reset in 240 seconds (ie, 4 minutes) or via a SOFT_RESET command. The...
View ArticleSOH % and SOH Status
I suspect that the description in the bq27425 spec for SOH % and SOH Status is wrong.Re SOH %: The spec says it goes from 0x00 to 0x64. I think it goes from 0x00 to 0x100 (256)Re SOH Status: The...
View ArticleSOC1 and SCOF
I have read the bq27425 spec for the two parameters SOC1 and SCOF, but I do not understand them.Q1) if SOC1 is set will I not get a valid reading for SOH % or the StateOfCharge?Q2) If SOCF is set will...
View ArticleCommunication error BQ3060 and EV2300
Hi,I have problems with my battery pack and the EV2300. bq evaluation software (0.9.59): The ev2300 connection could not be initiated! please close this program and try again. (No USB board detected)...
View Articlehelp with the BQ40Z50 and "DA register"
good day, Colleagues,My customer tries to implement the BQ40Z50 for 1S configuration, but the register "DA configuration" doesn't answer. Also the FET enable command (command 22) doesn't work.Could you...
View Articlebq27421 GPOUT
Hy allI'm using BQ27421 in one of our devices. The GPOUT pin is unused, but in the datasheet it is recommended to put a 10kOhm Pullup on it. My system should consume as less current as possible...
View ArticleBQ20Z65R1 State of Charge Drops After Temperature Cycling
I am currently working on a 4S1P battery pack that uses a BQ20Z65R1 to monitor the cells. What we have noticed is that after we run the packs through an environmental stress test some of the packs...
View Articleupdate status
The Update Status, in the section of the Data Block listed as Gas_Gauging, State(NVM) ,Offset = 2, is shown to have a Default value of 0x04 (0x34 in the -G2 chip). But, there is no explanation of what...
View ArticlebqProduction
I cannot get bqProduction to recognize my brand new HPA495 Advanced-bqmTester- I have an EV2300 with the "USB Tester Ready" sticker.- The 24V and 5V LEDs are Lit on the HPA495- When "Scan Boards" is...
View ArticleBQ27421-G1B questions
Hi, I'm using the Bq27421-G1B for my new design, but I got some questions need to clarify.1. could you provide me the correct production flow? My data memory will reset to the default when I using...
View ArticleBQ34Z100-G1 SHA algorithm
Since I need to use authentication provided by BQ34Z100-G1 (act as a SHA-1/HMAC authentication slave), I need to know its algorithm. However, I couldn't find it in the datasheet, only these words,"When...
View Articlefuel Gauge BQ 78350 and Monitoring BQ76940
Dear all,Our group is trying to use the fuel gauge BQ78350 in conjunction with BQ76940 monitoring IC (considered as a reference design). with the reference design, BQ76940 directly measures the...
View ArticleData Block values
I am using a bq27425 with a custom Battery. I am trying to set the "Design Capacity" and the "Design Energy" values in the Data Block for Gas_Gauging / State. The chart on page 17 of the bq27425 spec...
View ArticleBQ40Z60: 3S wiring
To use the BQ40Z60 with a 3S battery, would the proper wiring involve using VC1 - VC3 in the suggested configuration, and wiring VC4 to VC3, as in the 294700? Or should VC4 be left floating?Thanks.
View ArticleBQ27411 reporting 0% state of charge
After configuring and programming a pack with a BQ27411 and cycling they are a reporting 0% charge, is there an IT enable command I a missing (similar to other packs?) also there dose not seem to be...
View Articlebq2050 problem
Hi,I am using bq2050 in my project to display battery capacity. My battery size is 3200mah.I have connected 0.1uf capacitor to RBI pin which doesnt discharge on removal of battery. So we discharge it...
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